 | | Report (issue) | | SURVEY OF SOUTH AFRICA COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA MINERALOGY OF SOUTH AFRICA:... COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA Scientific Editor R.D. Dixon Linguistic and...Council for Geoscience (Geological Survey of South Africa), 280 Pretoria Street, Silverton, Pretoria or........................... 69 5.1 Overview of South African Occurrences ..............................LAYEREDSUITE,BUSHVELDCOMPLEX.... 111 MINERALOGY OF SOUTH AFRICA: TYPE-MINERAL SPECIES AND TYPE-MINERAL NAMES |  | | Journal (article/letter/editorial) | | Complex, South Africa R.N. Scoon Department of Geology, Rhodes University, Grahamstown 6140, South Africa...Geology, Rhodes University, Grahamstown 6140, South Africa Department of Earth, Environmental and Planetary...Operations South Africa, Rustenburg, South Africa © 2017 June Geological Society of South Africa Abstract...Abstract The 2055 Ma Bushveld Complex, South Africa, is well known for the occurrence of discordant bodies...core-zone of massive Fe-Ti oxides was the last SOUTH AFRICAN JOURNAL OF GEOLOGY 2017 âą VOLUME 120.2 PAGE |  | | Journal (article/letter/editorial) | | ROGER N. SCOONâ P.O. Box 2461, Rivonia 2128, South Africa AND ANDREW A. MITCHELL School of Geology,...KwaZulu-Natal, Private Bag 54001, Durban 4000, South Africa Abstract Discordant ultramafic bodies are a...significant feature of the Bushveld Complex, South Africa. Many of these bodies form subvertical, cylindrical...assemblage of forsteritic olivine with accessory Cr spinel), together with an extensive rim of clinopyroxenite...magnesian dunite pipes were forsteritic olivine and Cr spinel. Crystallization of orthopyroxene and plagioclase |  | | Journal (article/letter/editorial) | | Geology, Rhodes University, Grahamstown 6140, South Africa e-mail: rnscoon@iafrica.com A.A. MITCHELL Department...Durban 4000, South Africa e-mail: mitchaa@mweb.co.za © 2010 June Geological Society of South Africa ABSTRACT...as it is the site of the oldest platinum mine in South Africa. The central part of the pipe consists of...mineralized pipes, we ascribed formation of the Driekop pipe to orthomagmatic and partial melting processes...Introduction The four platiniferous dunite pipes, Driekop, Mooihoek, Onverwacht, and Twyfelaar, are restricted |  | | Journal (article/letter/editorial) | | FOR THE DRIEKOP PLATINIFEROUS DUNITE PIPE, EASTERN LIMB OF THE BUSHVELD COMPLEX, SOUTH AFRICA R.N. SCOON...Durban 4000, South Africa e-mail: mitchaa@mweb.co.za © 2009 June Geological Society of South Africa ABSTRACT...such pipe, at Driekop, are revisited on the basis of detailed mapping and sampling of mine workings that...iron-rich ultramafics at Driekop are distinguished by the absence of a spinel phase. The pipe crosscuts...(Fo85.1) suggest that the magnesian dunite in the Driekop pipe is orthomagmatic. This hypothesis is supported |  | | Journal (article/letter/editorial) | | bodies Roger N. Scoon PO Box 2461, Rivonia 2128, South Africa e-mail: rnscoon@iafrica.com Andrew A. Mitchell...4000, South Africa e-mail: mitchell@pixie.udw.ac.za © 2004 Geological Society of South Africa ABSTRACT...angles. They are restricted to four localities. The Driekop and Mooihoek pipes are emplaced in the Upper Critical...the history of the evaluation and mining of the Driekop, Mooihoek and Onverwacht pipes, which are among...forsteritic olivine (Fo85-80) with accessory Cr-spinel. The magnesian dunite forms comparatively deep-rooted |  | | Journal (article/letter/editorial) | | REPLACED MERENSKY REEF AT THE AMANDELBULT MINE, SOUTH AFRICA R.N. SCOON Department of Geology, Rhodes...Rhodes University, Grahamstown 6140, South Africa e-mail: rnscoon@iafrica.com A.A. MITCHELL School of Geological...4000, South Africa e-mail: mitchaa@mweb.co.za © 2011 March Geological Society of South Africa ABSTRACT...in the eastern limb of the Bushveld Complex, South Africa, differ sufficiently from one another to warrant...hypothesis. In our previous contributions on the Driekop, Onverwacht, and Twyfelaar localities we noted |  | | Journal (article/letter/editorial) | | ULTRAMAFIC PIPES, EASTERN BUSHVELD COMPLEX, SOUTH AFRICA FEDERICA ZACCARINI§ Via B. Ramazzini 15, I-41100...University of the Witwatersrand, PO Wits 2050, South Africa ABSTRACT The ultramafic pipes of Onverwacht...the eastern part of the Bushveld Complex, in South Africa, contain small xenoliths of chromitite that...ultramafic pipes, Bushveld Complex, Republic of South Africa. SOMMAIRE Les pipes ultramafiques de Onverwacht...The Merensky Reef in the Bushveld Complex, in South Africa, was discovered at about the same time (1924) |  | Scoon, Roger N., Mitchell, Andrew A. (2019) Discussion of âOxygen isotope and trace element compositions of platiniferous dunite pipes of the Bushveld Complex, South Africa - Signals from a recycled mantle component?â by GĂŒnther, T., Haase, K.M., Junge, M., OberthĂŒr, T., Woelki, D., and Krumm, S. Lithos, 324. 893-898 doi:10.1016/j.lithos.2018.09.023 | Journal (article/letter/editorial) | | platiniferous dunite pipes of the Bushveld complex, South Africa - Signals from a recycled mantle component?â...platiniferous dunite pipes of the Bushveld complex, South Africa - Signals from a recycled mantle component?â...platiniferous dunite pipes of the Bushveld Complex, South Africa - Signals from a recycled mantle component?â...University, Grahamstown 6140, South Africa 2 PO Box 421, McGregor 6708, South Africa MA NU SC 1 TE D...platiniferous dunite pipes of the Bushveld Complex, South Africa in many respects. The attempt to suggest there |  | | Journal (article/letter/editorial) | | The unique geologicalpositionof the pipes has Driekop,playeda significantrole ashigh-gradeplat- been...three pipeswason the order of 15,000 ozs. Driekop was the last mine to ceaseoperationsin 1961. The disappearanceof...prehensive surveyof the platinummineralogyof the Driekop pipe was presentedby Tarkian and 0561-0125/$2/74/1419-1252...mineralogical difference between platinum-rich, 2. DRIEKOP 0 ::::... Ă- o 20 40 ,. " 3. MOOIHOEK âą__âą...Mooihoek,and Driekop and even better, fits the conceptof metasomaticoroccur on a north-south-strikinglineament |  | | Journal (article/letter/editorial) | | and, paradoxically,many of the discorthe famous Driekop, Mooihoek, and Onverwacht dant bodies of ultramarie...observed although hybrid chromite-Ti magnetite spinel may occur. The nature of the pyroxene(orthopyroxene...valley in the The platiniferouscore zone in the Driekop pipe eastern BushveldComplex on the farm Maandags-...and mica.This assemblage may be referred to as a Driekop platiniferouspipe (Gain, 1980). Thesebod- platiniferous...priseonly four occurrences;those on the farms Driekop, Iron-Rich Ultramarie Pegmatite Regionaldistribution |  | | Journal (article/letter/editorial) | | DISCUSSION Discussion of âThe Bushveld Complex, South Africa: formation of platinumâpalladium, chromeand...of Geology, Rhodes University, Grahamstown, South Africa e-mail: rnscoon@iafrica.com A. A. Mitchell School...KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa De Klerk, Canad Mineral 25:51â77, 1987) and...with the overlying leuconoriteâanorthosite on the Driekop property, presented by Maier et al. as Fig. 5e...from the Upper Critical Zone at the Amandelbult mine (32 samples), 2 magnesian dunite, Winnaarshoek pipe |  | GĂŒnther, T., Haase, K.M., Junge, M., OberthĂŒr, T., Woelki, D., Krumm, S. (2018) Oxygen isotope and trace element compositions of platiniferous dunite pipes of the Bushveld Complex, South Africa â Signals from a recycled mantle component?. Lithos, 310. 332-341 doi:10.1016/j.lithos.2018.04.017 | Journal (article/letter/editorial) | | platiniferous dunite pipes of the bushveld complex, South Africa â Signals from a recycled mantle component?...platiniferous dunite pipes of the bushveld complex, South Africa â Signals from a recycled mantle component?...platiniferous dunite pipes of the Bushveld Complex, South Africa â Signals from a recycled mantle component?...isotope data of olivine and pyroxene from the Driekop, Mooihoek and Onverwacht pipes show that the parental...(Cawthorn et al., 2006; Eales and Cawthorn, 1996). The Driekop, Mooihoek and Onverwacht pipes (Fig. 1) have diameters |  | Maier, W. D., Barnes, S.-J., Groves, D. I. (2013) The Bushveld Complex, South Africa: formation of platinumâpalladium, chrome- and vanadium-rich layers via hydrodynamic sorting of a mobilized cumulate slurry in a large, relatively slowly cooling, subsiding magma chamber. Mineralium Deposita, 48 (1) 1-56 doi:10.1007/s00126-012-0436-1 | Journal (article/letter/editorial) | | 1007/s00126-012-0436-1 ARTICLE The Bushveld Complex, South Africa: formation of platinumâ palladium, chrome- and...mines, 2 Union platinum mine, 3 Impala platinum mines, 4 Rustenburg platinum mine, 5 Western platinum and...mines, 6 Crocodile River mine, 7 Messina platinum mine, 8 Atok platinum mine, 9 Maandagshoek section with...with Modikwa platinum mine, 10 Mineral Range and Shebaâs Ridge deposit, 11 Rooipoort, Moorddrift, and...were delayed until the Geological Survey of South Africa collared a series of boreholes (NG1â NG3) at |  | | Journal (article/letter/editorial) | | Platinum-group minerals of concentrates from the Driekop platinum pipe, Eastern Bushveld Complex â Tribute...concentrates originating from the Driekop platinum mine, South Africa, collected and first described by...by E. F. Stumpfl (1961), were investigated. Driekop is one of several zoned dunite pipes crosscutting...in the Bushveld Complex. The concentrates from Driekop contain single and polyphase grains, 5 to 500 ”m...PGE sulpharsenides. Key words: Bushveld Complex, Driekop, dunite pipe, platinum-group minerals. Introduction |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, PO Wits, 2050, South Africa e-mail: 065rgc@cosmos.wits.ac.za C. Harris Department... University of Cape Town, Rondebosch, 7700, South Africa F. J. Kruger Hugh Allsopp Laboratory of the...University of the Witwatersrand, PO Wits, 2050, South Africa Editorial responsibility: A. Hofmann pared...considered to have formed by replacement as a result of local migration of residual magma from the underlying...platiniferous olivine-rich pipes of Onverwacht, Driekop and Mooihoek (Fig. 1b) have been mined down to |  | | Journal (article/letter/editorial) | | overly simplistic, and the well-known occurrencesof Driekop, Structural Features The pipes are markedly...tensof kilometers). The layering adjacentto the Driekop pipe forms a major thepipesandthe MerenskyReef...Onverwachtpipes[Wagner,1929]. 1982], as has the Driekop pipe [Schiffries,1982]. The con- These structu...Tait and Jaupart's restrictedto this area, and local structuralcontrolsmay be suggestion that a single...fundamental processeswithin the magma chamber. whereasat Driekop (the least iron-rich)it formsa numberof Moreover |  | | Journal (article/letter/editorial) | | into Placers: Case Studies Bushveld Complex, South Africa, and Great Dyke, Zimbabwe Thomas OberthĂŒr Bundesanstalt...weathering cycle in the Bushveld Complex of South Africa and the Great Dyke of Zimbabwe. Samples were...PGM and Archean age (e.g., Bushveld Complex, South Africa; the Great Dyke, Zimbabwe; the Stillwater grains...âneoformationâ a the Bushveld Complex in South Africa, of the Sudbury district in Canada, and later Norilsk in...the farm Maandagshoek, then eastern Transvaal, South Africa, led to the discovery of the largest PGE deposits |  | | Journal (article/letter/editorial) | | fluid contamination in the Bushveld Complex, South Africa: an analogue for subduction zone fluid migrationâ...fluid contamination in the Bushveld Complex, South Africa: an analogue for subduction zone fluid migrationâ...fluid contamination in the Bushveld Complex, South Africa: an analogue for subduction zone fluid migrationâ...stratigraphy, channelled both by rapid porous flow and local formation of diatreme pipes and that this fluid...in the underlying country rock, but explain the local occurrence of what appear to be examples of magmatic |  | | Book (edition) | | Meta/lurgical and Mineralogical Society o/ South Africa Journal of Chemical Phy ics Journal cif the...and Proceedings of the Royal Socief) 1 of Ne,v South Wales JPSJ Journal of rhe Physical Society of...Cand CSPG Pennskiye gubemskiye wdomo.sti (Perm district ga=elle) Pl,ilosopl,ical Maga=ine Periodico de...Abernathyitc, K[(UO 2 )(AsO,)](HP) 3, tet., Fumerole No. 2 mine, Temple Mountain. on the southeast flank of the...104(3). 326-328 ⥠Achavnlitc, FcSe, hex .. Cacheuta Mine. Ccrro de Cacheuta. Sierra de Cacheuta. Mcndoza |  | | Book (edition) | | {100} lamellar isotropic rare, spinel law brown isotropic rare, dark spinel red law, lamellar 32 Thoreaulite... Pyrobitumen white to brownish depends spinel law on spinel type, here pink yellow to brownish strong...shades isotropic Bismutotantalite Oldhamite Spinel Valentinite Foordite Smithsonite Sussexite...Reflect. Mineral brown Brannerite brownish spinel law red only in thinnest sections only as finest...orange deep red Chalcophanite isotropic dark red spinel law Franklinite 42 Hausmannite Reflection |  | | Journal (article/letter/editorial) | | from the early Proterozoic Bushveld Complex, South Africa Jacob Adetunji a , Simon Everitt a,b , Hugh...Rhodes University, P.O. Box 9, Grahamstown 6140, South Africa a r t i c l e i n f o Article history: Received...Rustenberg Layered Suite of the Bushveld Complex, South Africa vary between 0.139 and 0.232 (mean = 0.185 ±...early Proterozoic Bushveld layered intrusion in South Africa and present new measurements of their redox...Geological background The 2.06 Ga Bushveld Complex in South Africa contains the worldâs largest layered maïŹc intrusion |  | | Journal (article/letter/editorial) | | EUGENE N. CAMERON OF SOUTH AND No. 2 PEGMATITES THE BUSHVELD AFRICA GEORGE A. DESBOROUGH ABSTRACT...pegrnatitesin the easternpart of the BushveldComplexof South Africa have been known for many years. The pegmatitesare...platinum-bearing pipes of Onverwacht,Mooihoek,and Driekop,minedchieflyin the 1920's. These andotherbodiesweredescribed...by differentiation. Heckroodt(5) restudiedthe Driekop platinumpipe and inferredthat the dunite pipe was...Biljon (7) describedthe geologyof an area east and south of Steelpoort,extendingacrossGrootboomonto Annex |  | Scoates, James S, Wall, Corey J, Friedman, Richard M, Weis, Dominique, Mathez, Edmond A, VanTongeren, Jill A (2021) Dating the Bushveld Complex: Timing of Crystallization, Duration of Magmatism, and Cooling of the Worldâs Largest Layered Intrusion and Related Rocks. Journal of Petrology, 62 (2) doi:10.1093/petrology/egaa107 | Journal (article/letter/editorial) | | Paleoproterozoic Bushveld Complex in the Kaapvaal craton of South Africa includes an immense layered intrusion characterized...magmatism. GEOLOGICAL SETTING OF THE BUSHVELD COMPLEX South Africaâs Bushveld Complex intruded into the Kaapvaal...[SA04-08, Driekop Farm exposure, Eastern Limb; SA04-13, underground from a mining face in the West mine, Townlands...Townlands shaft (now known as the Khuselaka platinum mine, Khuseleka 1 shaft), Western Limb] were used to...interpreted as a magma conduit that hosts one of South Africaâs largest NiâCuâCrâPGE deposits at Nkomati |  | | Journal (article/letter/editorial) | | level in the north and become shallower to the south. Communicated by Timothy L. Grove. Electronic supplementary... Keywords Rooiberg Group · Bushveld Complex · Driekop Dome · Mphanama · Masekete · Roof zone · Residual...Intrusion of Antarctica, and Bushveld Complex of South Africa. The Bushveld Complex is part of the massive...limb alone crops out for more than 150 km northâsouth. Due to the enormous size of the Bushveld, the roof...immediate roof in four locations from north to south in the eastern limb. The present report builds on |
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